BTW I just got done this quest, WOW, hardest thing to pull off ive ever had to do. I'm not in a big org, and on top of that I'm neutral. I know most of these posts are aimed at uber guilded people sharing notes on quest specifics that everyone needs to know, even ubers, but here's some info for the commoner.
I'll sum up my experience in case anyone else goes through this, theyll know what to look out for. This was by far the most social quest ive ever had to do, I mean I can see having to do all this for some uber item, but I just want to see another playfield and get my money's worth. But we all gotta do it says funcom, so here's my experiences.

First, I didnt bring enough firepower to kill Cama/Vanya, and I had to watch in horror as it despawned. If this happens you are screwed and you lose your yomi page, be sure to bring enough firepower! A single uber team can probably do it, but 2+ teams better. If youre underequipt just bite the bullet and call off the raid, its not worth not being able to kill it.

After I got another yomi page, I made a deal with an org to help me, I showed up to find another 2 raids going on, and I had to 'get in line'. That was very frustrating, it got that org mad at me because they assembled all these people and couldnt do anything. I appeased them by having them just shoot at cama (I did the omni version that time) and get some faction, and I had to make a deal with the current raiding team, I'd use my page up in return for loot rights on the heart.

Tips: Watch for people standing outside temples in case they are resetting. If everyone clears out and stays out, 20 minutes and all mobs respawn. Otherwise its like much longer (hours?). So it does nobody any good to just rush in and ruin a reset. If youre on a ammy run headed for catacombs, dont be a <insert clever derogatory term>, just wait for reset, it doesnt take that long.
Also, it can get packed, and you want to work it out with other raid leaders. If people get good at resetting you can burn through a lot of spawns and get everyone their quest items.
DO NOT TALK to the npc that spawns when you kill cama (omni quest), just hand it the item, if you talk it despawns. ouch.

Now another thing, for some reason nobody cares about rings, everyone is just doing that stupid amulet run. How does everyone get their molars? It must be all org activity. But why not have amulet runs be org activity as well? Very interesting social stuff happens.

btw, in 15.5.0 this quest was changed back? First part its a kill mobs in Adonis catacombs?
I've got my ring after we killed Ice Golem and I looted Molar and bring to Ergo. Ergo gave me the ring +7. That's all. What first part they talking about?  :?

information i get from a gm (04/12/2004)

[Gannondorph]:
Alright. That was changed in the last patch. It was not suppose to work that way. The way the quest works now, requires you to give 'The Book of Insignificant Rituals' to Prophet Urga Van. This actually issues a mission now, and is needed to complete the quest.We have had alot of confusions over this since it wasn't in the patch notes.

In the past, i did Adonis Catacombs a dozen of times. The bosses never droped the page, and i guess it's always like that. From my experience, only Yomi drops the Yomi page. It dropped it like 9 on 12 times.